Software
Engineer
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Beginner·7 lessons·60 min

Linux Basics

The command line, from zero. Learn how the shell actually works, how to move around a filesystem, and how to read the permissions and processes that everything else in Linux is built on.

Start — What Is a Shell?
  1. 01What Is a Shell?What you're actually talking to when you open a terminal. 6 min
  2. 02Navigating the Filesystempwd, ls, and cd — and the tree they move you through. 8 min
  3. 03Files and DirectoriesCreating, copying, moving, and deleting things without regret. 9 min
  4. 04Reading and Editing Filescat, less, and surviving your first encounter with vim. 8 min
  5. 05PermissionsWhy 'Permission denied' happens, and what rwx and chmod 644 really mean. 10 min
  6. 06ProcessesEvery running thing has a number. Find it, watch it, stop it. 9 min
  7. 07Pipes and RedirectionThe idea that makes the whole command line worth learning. 10 min